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Meteorology of Philadelphia
Meteorology of _Philadelphia.
28~
A Co.~rhnlSON of some of the Meteorological Phenomena of AUOUST' 1 8 6 7 i w i t h those , f Av(~t;s'r, 1 8 6 6 , and of the same month f o r s E v E ~ a ' ~ r years, at Philadetphia, Pa. B a r o m e t e r (it) f e e t a b o v e m e a n t i d e in the D e l a w a r e R i v e r ~ L a t i t u d e .~ ~o 57,~ i N " L o ~ g i t i d e 75 ° 11~-/ ~V. f r o m G r e e n w i c h . B y 1)go~'~sso~¢ J . A . l,:.im,:l'2,'rl¢~-cI':, el t h e C e n t r a l l : h g h S c h o o l .
August, 1867.
August, 18~6.
AuguSt,
-!1
for 17 y e a r s .
86-00 ° 88.00 ° 97.00 ° 14th. 1st & 2d. 2, ' 5 6 ; 4, '59. 80"67 81.50 ~Varmest d~y--mcan . 88.50 19ill ,, ,, d a t e ..... 2d. 10th, '63. 59 .t,0 57.00 Lowest--degree .......... , 47-00 1st. 24th. ,, d a t e . . . . . . . . . ,... 26th, '56. 67 "50 62.~0 59'00 Coldest day--mean ...... 3]st. ,, ,, date ....... 23d. 26th, '56. 12'44 14.o3 5lean daily oscillation... 15"24 3"68 3'77 3.69 " " range......... 71 -O2 67 "82 70'85 ~[eans a t 7 A . ~I .......... 78"18 78.36 81 "01 74.56 71.32 73'93 " 9 P . M .......... 74'59 75'26 72.50 " for the month .... 30-210 30.255 29-957 Barometer--Ilighest--inches ............... 31st. 2 0 t h , '55. ] 7th. ,, d~te .................. 30.128 80-229 29.935 Greatest mean dailypressure 26th. 20 & 81, ~55. 12th. ,, ', d'~te... 29"356 29 ' 5 7 8 29.376 Lowest--inches ............... 16th. 2Oth, '56. 9th. ~ (][a~C . . . . . . . . . . . . . . . . . 29"388 29 "599 29.459 Lcas~ mean daily pressure... 2 0 t h , '56; 16th. 9th. ,' " date... 0"095 0"108 0'096 i~:can d a i l y r a n g e . . . . . . . . . . . . . 29.865 29.750 29 "967 )~[eans a t 7 ~. M . . . . . . . . . . . . . . . 29 "836 29.711 29"939 " 2P. M ............... 29"856 29 "944 29.751 ~ 9P. i~I . . . . . . . . . . . . . . . 29.852 29"737 29 ' 9 5 0 " for the month ......... 1"024 0.818 0"815 Force of Vapor~Greatest--inches ....... 1st, '54. 9th. 14th. " date .......... "268 "851 "317 Least inches ............ Often. 17th. 30th. " date ............... .584 "522 • 602 ) l e a n s a t 7 A. g . . . . . . . . . .592 .547 "609 " 2 P . Vl ......... .613 .568 .645 t~ 9 r. ~ ¢ ~ . . . . . . . . . "596 .546 .619 " for the month... 100.0 95.0 92-0 :Relative H u m i d i t y Greatest--per cent 26th, '54. " d a t e . . . . . . 1 5 t h & 22d. 1 3 t h & 1 4 t h . 27"0 42,0 36.0 Least per cent .... Ist, '~0. 18th. " date .......... 11th & 26th. 76 "2 75.4 78.7 ) , [ c a n s a t 7 A. ~ . . . . 56.4 56.7 63.4 ~' 2 P . M .... 73•1 73 "7 t~ 9P.M 75 "2 68.6 68'6 72 '4 " for the month 9.5 10" 9' Clouds--Number of clear days* .......... 21" 22" " cloudy days ......... perct 52-9 p e r ( 6 3 . 2 p e r cl ]~[eans o f s k y c o v e r e d a t 7 ~. ~a 59"7 63.5 " " " 2 P. M 41.7 36;1 . . t~ 9 P. M 44'5 58.1 49"6 57.1 " " for the month 4.520 2.567 16-840 Rain--Amount--inches .................... 10"1 • 12" 15' lqo. of d a y s o n w h i c h r a i n f e l l . . . . . . . . . . . . s67°16 ' w.081 Prevailing Winds~Times i n 1 0 0 0 . . . . . . . ~52° 2 6 ' ~ •094 s 8 6 o s f f w - 8 3 6
Thermometer--Highest ~
degree .......... d~tte .............
. . . .
~
* Sky
o n e - t h i r d o r less c o v e r e d a t t h e h o u m o f o b s e r v a t i O i L
288
Meteorology of JPhiladelphia.
of some ()if the 3Ieteorological PAenomena o f the Su~m~m of 1 8 6 7 with those of 1866, (vnd of the same Season f o r SIXTEgS years~ at Philad"elphia,
A Co.m,~kaIsoN
Pa. Barometer (it) feet above mean t i d e in the D e l a w a r e River. L a t i t u d e 39 ° 57~ r 1N.; L o n g i t u d e 75 ° 11¼' W . from Greenwich. By l)~oF. J . A. Kn~xPA'r~IC~Zj of the Central I f i g h School. ~ummert 1867.
Summer, 1866.
T h e r m o m e t e r - - H i g h e s t - - d e g r e e .......... 101.00 ° 9l'00 ° " d a t e ............. J u l y 4. J u l y 17. W a r m e s t d a y - - m e a n .... 92.33 85'67 " " date ...... J u l y 4. J u l y 17. :Lowest--degree .......... 48-00 56.00 " date ............. J u n e 9 & 11. June 1: Coldest d a y - - m e a n ...... 62"00 53.50 " " date ....... J u n e 9. A u g . 23. 31:can d a i l y oscillation... 14"73 14.56 " " r a n g e ......... 4-O2 4.23 3Ieans at 7 x. M . . . . . . . . . . 70'21 71 '12 ~' 2 I'. i~I .......... 81.71 78'87 " 9 P.M .......... 73.08 74"O7 " for the Summer... 74-05 7563 B a r o m e t e r - - I [ i g h c s t - - i n c h e s .............. 30"309 30'072 " d'tte .................. J u n e 11. J u l y 2. G r e a t e s t m e a n dailypressure 30.270 30-015 " " " date... J u n e 11. J u l y 2. L o w e s t - - i n c h e s ................ 29.474 29.376 " date .................. J u n e 3. Aug.,9. :Least m e a o daily pressure. 29.586 29.459 " " " date... J u n e 3. A u g . 9, ) l e a n d a i l y range ............. 0.103 0"095 ~Means at 7 ~_. M ................ 29.971 29.704 " 2 P. M ................ 29.946 29-725 ~ 9 P.M ................ 29.951 29.753 " for the Summer ....... 29,956 29.747 :Force of V a p o r G r e a t e s t - - i n c h e s ....... 0.925 0"980 ~ date .......... J u l y 6. J u l y 17. L e a s t - - i n c h e s .......... .183 '265 " date ............. J u n e 10, J u n e 1. :5[cans at 7 A. ~s ......... .559 "574 " 2 Z ' . ~ ......... .558 "580 ~' 9P.M ......... .598 -620 " for t h e S u m m e r : .572 "591 :Relative I I u m i d l t y - - G r e a t e s t per cent 95.0 95'0 " date ...... J u n e 25. &ug. 13 &14. :Least--per cent .... 28'0 36.0 " d a t e ......... J u n e 10. J u l y 81. 3 l e a n s at 7 A. M...: 74.5 73.6 '~ 2 P . M .... 56.7 58"6 " 9P.~ .... 72.4 72'5 " for t h e S u m m e r 67.9 66 '6 C l o u d s - - N u m b e r of clear days~" .......... 31. 83. " c l o u d y days .......... 61. 59. ~eans o f sk y covered a t 7 A, 60'6pete1 52.4 per ct 61.5 57.4 *t ~t c, 9 P. M 46 '8 41.0 "' " for the S u m m e r 56.3 gO.8 t r a i n - - A m o u n t - - i n c h e s ....................... 30.820 8' 470 :No. o f clays on w h i c h r a i n fell ............... 38. I '36. ~Mli~g W i n d s - - T i m e s in 1 0 0 0 . . , s 86~49fw.071 s71°48'w.301
Summert for 16 y e a r s .
101.00 ° J u l y 17, ' 6 6 . 92'33 J u l y 17, ' 6 6 . 42"00 J u n e 5, ' 5 9 , 53'50 June 9, ' 6 7 . 15.72 4.14 7t'15 81.16 73.82 75'38 30.309 June 11, ~67. 30.270 June 11, ' 6 7 . 29.182 June 11, ' 5 7 . 29.262 J une 11, ' 5 7 . 0.096 29.842 29'811 29.829 29.827 1.059 June 30, ' 5 5 . .142 June 14~ ' 6 1 . .570 .576 .60l .582 190'0 A26'54,J6 °5 6 22'0 J u n e 16, ' 6 3 . 73"3 54'3 71.2 66'3 26"3 65'7 58.4 p e r c t 60'7 42'9 54"1 12.863 82.9
S k y o n e - t h i r d or less coverad at the hour~ of o b ~ ¢ r w t i o a ,
7 1 ° 4 0 t W "t 6 7
28~
A Co.~rhnlSON of some of the Meteorological Phenomena of AUOUST' 1 8 6 7 i w i t h those , f Av(~t;s'r, 1 8 6 6 , and of the same month f o r s E v E ~ a ' ~ r years, at Philadetphia, Pa. B a r o m e t e r (it) f e e t a b o v e m e a n t i d e in the D e l a w a r e R i v e r ~ L a t i t u d e .~ ~o 57,~ i N " L o ~ g i t i d e 75 ° 11~-/ ~V. f r o m G r e e n w i c h . B y 1)go~'~sso~¢ J . A . l,:.im,:l'2,'rl¢~-cI':, el t h e C e n t r a l l : h g h S c h o o l .
August, 1867.
August, 18~6.
AuguSt,
-!1
for 17 y e a r s .
86-00 ° 88.00 ° 97.00 ° 14th. 1st & 2d. 2, ' 5 6 ; 4, '59. 80"67 81.50 ~Varmest d~y--mcan . 88.50 19ill ,, ,, d a t e ..... 2d. 10th, '63. 59 .t,0 57.00 Lowest--degree .......... , 47-00 1st. 24th. ,, d a t e . . . . . . . . . ,... 26th, '56. 67 "50 62.~0 59'00 Coldest day--mean ...... 3]st. ,, ,, date ....... 23d. 26th, '56. 12'44 14.o3 5lean daily oscillation... 15"24 3"68 3'77 3.69 " " range......... 71 -O2 67 "82 70'85 ~[eans a t 7 A . ~I .......... 78"18 78.36 81 "01 74.56 71.32 73'93 " 9 P . M .......... 74'59 75'26 72.50 " for the month .... 30-210 30.255 29-957 Barometer--Ilighest--inches ............... 31st. 2 0 t h , '55. ] 7th. ,, d~te .................. 30.128 80-229 29.935 Greatest mean dailypressure 26th. 20 & 81, ~55. 12th. ,, ', d'~te... 29"356 29 ' 5 7 8 29.376 Lowest--inches ............... 16th. 2Oth, '56. 9th. ~ (][a~C . . . . . . . . . . . . . . . . . 29"388 29 "599 29.459 Lcas~ mean daily pressure... 2 0 t h , '56; 16th. 9th. ,' " date... 0"095 0"108 0'096 i~:can d a i l y r a n g e . . . . . . . . . . . . . 29.865 29.750 29 "967 )~[eans a t 7 ~. M . . . . . . . . . . . . . . . 29 "836 29.711 29"939 " 2P. M ............... 29"856 29 "944 29.751 ~ 9P. i~I . . . . . . . . . . . . . . . 29.852 29"737 29 ' 9 5 0 " for the month ......... 1"024 0.818 0"815 Force of Vapor~Greatest--inches ....... 1st, '54. 9th. 14th. " date .......... "268 "851 "317 Least inches ............ Often. 17th. 30th. " date ............... .584 "522 • 602 ) l e a n s a t 7 A. g . . . . . . . . . .592 .547 "609 " 2 P . Vl ......... .613 .568 .645 t~ 9 r. ~ ¢ ~ . . . . . . . . . "596 .546 .619 " for the month... 100.0 95.0 92-0 :Relative H u m i d i t y Greatest--per cent 26th, '54. " d a t e . . . . . . 1 5 t h & 22d. 1 3 t h & 1 4 t h . 27"0 42,0 36.0 Least per cent .... Ist, '~0. 18th. " date .......... 11th & 26th. 76 "2 75.4 78.7 ) , [ c a n s a t 7 A. ~ . . . . 56.4 56.7 63.4 ~' 2 P . M .... 73•1 73 "7 t~ 9P.M 75 "2 68.6 68'6 72 '4 " for the month 9.5 10" 9' Clouds--Number of clear days* .......... 21" 22" " cloudy days ......... perct 52-9 p e r ( 6 3 . 2 p e r cl ]~[eans o f s k y c o v e r e d a t 7 ~. ~a 59"7 63.5 " " " 2 P. M 41.7 36;1 . . t~ 9 P. M 44'5 58.1 49"6 57.1 " " for the month 4.520 2.567 16-840 Rain--Amount--inches .................... 10"1 • 12" 15' lqo. of d a y s o n w h i c h r a i n f e l l . . . . . . . . . . . . s67°16 ' w.081 Prevailing Winds~Times i n 1 0 0 0 . . . . . . . ~52° 2 6 ' ~ •094 s 8 6 o s f f w - 8 3 6
Thermometer--Highest ~
degree .......... d~tte .............
. . . .
~
* Sky
o n e - t h i r d o r less c o v e r e d a t t h e h o u m o f o b s e r v a t i O i L
288
Meteorology of JPhiladelphia.
of some ()if the 3Ieteorological PAenomena o f the Su~m~m of 1 8 6 7 with those of 1866, (vnd of the same Season f o r SIXTEgS years~ at Philad"elphia,
A Co.m,~kaIsoN
Pa. Barometer (it) feet above mean t i d e in the D e l a w a r e River. L a t i t u d e 39 ° 57~ r 1N.; L o n g i t u d e 75 ° 11¼' W . from Greenwich. By l)~oF. J . A. Kn~xPA'r~IC~Zj of the Central I f i g h School. ~ummert 1867.
Summer, 1866.
T h e r m o m e t e r - - H i g h e s t - - d e g r e e .......... 101.00 ° 9l'00 ° " d a t e ............. J u l y 4. J u l y 17. W a r m e s t d a y - - m e a n .... 92.33 85'67 " " date ...... J u l y 4. J u l y 17. :Lowest--degree .......... 48-00 56.00 " date ............. J u n e 9 & 11. June 1: Coldest d a y - - m e a n ...... 62"00 53.50 " " date ....... J u n e 9. A u g . 23. 31:can d a i l y oscillation... 14"73 14.56 " " r a n g e ......... 4-O2 4.23 3Ieans at 7 x. M . . . . . . . . . . 70'21 71 '12 ~' 2 I'. i~I .......... 81.71 78'87 " 9 P.M .......... 73.08 74"O7 " for the Summer... 74-05 7563 B a r o m e t e r - - I [ i g h c s t - - i n c h e s .............. 30"309 30'072 " d'tte .................. J u n e 11. J u l y 2. G r e a t e s t m e a n dailypressure 30.270 30-015 " " " date... J u n e 11. J u l y 2. L o w e s t - - i n c h e s ................ 29.474 29.376 " date .................. J u n e 3. Aug.,9. :Least m e a o daily pressure. 29.586 29.459 " " " date... J u n e 3. A u g . 9, ) l e a n d a i l y range ............. 0.103 0"095 ~Means at 7 ~_. M ................ 29.971 29.704 " 2 P. M ................ 29.946 29-725 ~ 9 P.M ................ 29.951 29.753 " for the Summer ....... 29,956 29.747 :Force of V a p o r G r e a t e s t - - i n c h e s ....... 0.925 0"980 ~ date .......... J u l y 6. J u l y 17. L e a s t - - i n c h e s .......... .183 '265 " date ............. J u n e 10, J u n e 1. :5[cans at 7 A. ~s ......... .559 "574 " 2 Z ' . ~ ......... .558 "580 ~' 9P.M ......... .598 -620 " for t h e S u m m e r : .572 "591 :Relative I I u m i d l t y - - G r e a t e s t per cent 95.0 95'0 " date ...... J u n e 25. &ug. 13 &14. :Least--per cent .... 28'0 36.0 " d a t e ......... J u n e 10. J u l y 81. 3 l e a n s at 7 A. M...: 74.5 73.6 '~ 2 P . M .... 56.7 58"6 " 9P.~ .... 72.4 72'5 " for t h e S u m m e r 67.9 66 '6 C l o u d s - - N u m b e r of clear days~" .......... 31. 83. " c l o u d y days .......... 61. 59. ~eans o f sk y covered a t 7 A, 60'6pete1 52.4 per ct 61.5 57.4 *t ~t c, 9 P. M 46 '8 41.0 "' " for the S u m m e r 56.3 gO.8 t r a i n - - A m o u n t - - i n c h e s ....................... 30.820 8' 470 :No. o f clays on w h i c h r a i n fell ............... 38. I '36. ~Mli~g W i n d s - - T i m e s in 1 0 0 0 . . , s 86~49fw.071 s71°48'w.301
Summert for 16 y e a r s .
101.00 ° J u l y 17, ' 6 6 . 92'33 J u l y 17, ' 6 6 . 42"00 J u n e 5, ' 5 9 , 53'50 June 9, ' 6 7 . 15.72 4.14 7t'15 81.16 73.82 75'38 30.309 June 11, ~67. 30.270 June 11, ' 6 7 . 29.182 June 11, ' 5 7 . 29.262 J une 11, ' 5 7 . 0.096 29.842 29'811 29.829 29.827 1.059 June 30, ' 5 5 . .142 June 14~ ' 6 1 . .570 .576 .60l .582 190'0 A26'54,J6 °5 6 22'0 J u n e 16, ' 6 3 . 73"3 54'3 71.2 66'3 26"3 65'7 58.4 p e r c t 60'7 42'9 54"1 12.863 82.9
S k y o n e - t h i r d or less coverad at the hour~ of o b ~ ¢ r w t i o a ,
7 1 ° 4 0 t W "t 6 7